What absorbs at 3140 cm⁻¹ in an FTIR spectrum?

Stutt svar

A band near 3140 cm⁻¹ is usually interpreted by checking which functional groups repeatedly co-occur there in the literature, then confirming at least one or two additional peaks in the same sample. This page ranks those assignments by accumulated evidence rather than by a single fixed textbook rule.

Mögulegar úthlutun virkra hópa

Röðun endurspeglar uppsöfnuð ritrýnisgögn, ekki eina valdboðsreglu. Staðfestu alltaf í samhengi við sýnið þitt.

Möguleg efni

Efni birtast aðeins þegar sama bókmenntasafn styður þessa band og að minnsta kosti einn viðbótar einkennandi hámark.

Rófrök

This band becomes meaningful only when read with its neighboring peaks. In practice, analysts first look at the assignments above, then check whether the same sample also shows other peaks expected for the same structural motif. A lone band near 3140 cm⁻¹ is usually not enough for material identification by itself.

Raunveruleg notkun

Þessi tegund fyrirspurna er algeng við auðkenningu fjölliða, skimun óþekktra plasttegunda, bilanaleit í gæðaeftirliti, staðfestingu endurunnins efnis og bókmenntabakkaða endurskoðun á hápunktum.

Algeng mistök

• Meðhöndla eina einangraða öldulengd sem sönnun á efni án þess að athuga að minnsta kosti einn eða tvo stuðningstoppa.
• Hunsa skörun: mörg virkir hópar geta lagt sitt af mörkum nálægt sömu bylgjutölunni.
• Að sleppa staðfestingu þegar aukefni, blöndur, oxun eða mengun geta brenglað litrófið.

Staðfestingarráðgjöf

Þegar tvíræðni er eftir, staðfestu tilgátuna með DSC, GC-MS eða TGA, sérstaklega fyrir blöndur, niðurbrotin sýni og fylltar fjölliður.

Ritlist á bak við þessar úthlutanir

• Alkyl C-H öryggi 1,0

  “In the FTIR spectrum of [DEIm][Br] (Figure 1b), cm-1 C-H the peak at 3140 was due to the bond of imidazole ring,63”

  Ionic Liquid Functionalized Metal–Organic Framework ([DEIm][PF6]@MOF-5): Synthesis, Characterization, and Catalytic Application in the Reduction of 4-Nitrophenol DOI: 10.1021/acsomega.2c05808
• Aromatic ring öryggi 1,0

  “Louis, MO, USA) were added to the inactivated peaks observed at 3140 are attributed to aromatic C-H cell medium at 45 °C for 1 h and incubated at 37 °C in an stretching vibration bands.”

  Erol 等 - 2023 - ZnO-containing nanocomposites produced from Mentha DOI: 10.1007/s10965-023-03461-8
• Hydrogen bond öryggi 1,0

  “Bands at 3140 and 3093 could be attributed to the valence vibration of intramolecular hydrogen bond in the EA molecule cm-1 [44].”

  Ilic-Stojanovic 等 - 2018 - Thermosensitive hydrogels for modified release of DOI: 10.1080/00914037.2017.1354202
• Silicon-oxygen (Si-O) öryggi 1,0

  “7 the FTIR absorption between 3236 and 3250 is due to hydroxyl ions of the clay minerals, cm-1 and the peak at 3140 can be attributed to hydrated ferric oxide.”

  Sanchez-Polo 等 - 2019 - An Archaeometric Characterization of Ecuadorian Po DOI: 10.1038/s41598-018-38293-w
• N h öryggi 0,7

  “Same sentence as above.”

  Innovative non-thermal plasma disinfection process inside sealed bags: Assessment of bactericidal and sporicidal effectiveness in regard to current sterilization norms DOI: 10.1371/journal.